Ammunition priming composition



Patented June 6, 1944 AMMUNITION PRIIHING COMPOSITION Willi Briin and Philip H. Burdett, Bridgeport, Conn, assignors to Remington ArmsCompany,

Inc., a corporation of Delaware No Drawing. Application June 14, 1941, Serial No. 398,116

4 Claims.

This invention relates to the acid lead salt of di-nitroso-resorcinol, especially to its preparation. More particularly it appertains to its use i in priming mixtures for ammunition.

The primary objects of this invention were to produce the hitherto unknown acid lead salt of 2:4 -di-nitroso-resorcino1 and to compound emcient ignition compositions containing the same.

.. A general advance in the art, andother objects which will appear hereinafter, are also contemplated.

The acid lead salt of di-nitroso-resorcinol, assuming the cyclo-hexene-di-oxime formula, probably has the structure:

It can be prepared (the parts being given by weight) by dissolving, with stirring, 37 parts (0.2 mol) of di-nitroso-resorcinol monohydrate in 1700 parts of water containing 8 parts (0.2 mol) of sodium hydroxide in solution, heating the resultant solution to 70 C., .and adding drop-wise 35 parts (approximately 0.1 mol) of lead nitrate dissolved in 200 parts of water. Isolation of the desired product is brought about by cooling (with stirring) the reaction mixture and filtering off the precipitated dark green, amorphous, easily broken up salt. Satisfactory purification is obtained by washing repeatedly with water, followed by a final ethyl alcohol wash and air drying. Check samples of such a product gave upon analysis lead contents of 38.27% and 38.25%. According to theory the content is 38.30%.

Except for minor changes in concentration and temperature, as necessitated by difierences in solubilities, the acid salts of other heavy metals and the acid salts of the alkaline earths are prepared in a like manner. -By heavy metals" is meant metals having the property of being qualitatively precipitated by hydrogen sulfide or ammonium sulfide; while the alkaline earths are qualitatively precipitated by ammonium carbonate and ammonium phosphate.

For example, in preparing the acid silver; acid cadmium and acid barium salts, the procedural steps are the same, and the proportions of materials for the solutions to be added to the solutionof 37 parts (0.2 mol) of di-nitroso-resorclnol made comprise a number of ingredients which monohydrate and of 8 parts of sodium hydroxide (0.2 mol) in 1700 parts of water are:

AgNOa 34 parts (approximately 0.2 mol) CdSO4-8/3H2O 26' parts (approximately 0.1 mol) BaC1z-2H2O 24 parts (approximately 0.1 mol) The structural formulae for these last mentioned acid salts are:

Acid silver di-nitroso-resorcinate The brown, amorphous acid cadmium salt appears to carry one mol of water of crystallization. The acid barium salt is brown and amorphous. The acid silver salt is dark green, almost black, and its filter cake is difficult to break up.

Typical examples of priming mixtures employing the new compounds arez- Ammunition priming mixtures as ordinarily of starting the reaction between the fuel and the oxidizer substances). Other combustion initiators, oxidizers (particularly the non-corrosive type) and fuels may be used in conjunction with the acid di-nitroso-resorcinol salts of this invention, and the proportions of the ingredients of resorcinoi.

the ignition mixtures may vary widely. A practiceirange of proportions of the acid lead salt'oi di-nitroso-resorcinoi 'is from about1% to 15% of the priming mixture.

The acid heavy metal salts of di-nitroso-resorcinol being broadly new, the appended claims are to be broadly construed.

We claim:-

l. A priming mixture for ammunition containing 1% to 15% of the acid lead salt of di-nitrosoresoroinol.

,2. An ignition mixture containing approximately: i

' Percent Acid lead di-nitroso-resorcinate 8 Lead stvphnate 40 Tetrazene 2 Lead nitrat 30 Glass 20 3. A priming mixture for ammunition containing 1% to 15% of an acid salt of di-nitroso- 4'. A priming mixture {or ammunition comprising essentially:

, Per cent Acid heavy metal di-nitroso-resbrcinate--- 8' Lead styphnate 40 Tetrazene 2 Lead nitrate 30 Glass 2o win; new.

Pm n. nononrr. 

